[Pacemaker] exportfs resource agent modifications

[Hauke Bruno Wollentin]

of course I currently use an active/active setting for some load spreading 
issues, but I will try to use an (more ordered) active/passive setting. I need 
that for VMWare and afaik it is NFSv3 so far.

Thanks for pointing things out.

Cheers,
Hauke

---
original message
timestamp: Monday, November 17, 2014 11:53:09 AM
from: David Vossel <dvossel at redhat.com>
to: The Pacemaker cluster resource manager <pacemaker at oss.clusterlabs.org>
cc: 
subject: Re: [Pacemaker] exportfs resource agent modifications
message id: <1005680886.61322.1416243189209.JavaMail.zimbra at redhat.com>

> ----- Original Message -----
> 
> > Hi there,
> > 
> > we are using exportfs for building datastores for VMWare.
> > 
> > After migrating 1 NFS resource to another node (after sucessful fencing
> > e.g.),
> > VMWare doesn't see that datastore until I manually fire _exportfs -f_ on
> > the new cluster node.
> > 
> > I tried to modify the resource agent itself like:
> > 
> > 247         restore_rmtab
> > 248
> > 249         ocf_log info "File system exported"
> > 250
> > 251         sleep 5 #added
> > 252
> > 253         ocf_run exportfs -f || exit $OCF_ERR_GENERIC #added
> > 254
> > 255         ocf_log info "kernel table flushed" #added
> > 256
> > 257         return $OCF_SUCCESS
> > 
> > but this didn't do the trick.
> > 
> > Does anyone has an idea how to resolve that issue?
> 
> HA NFS is tricky and requires a very specific resource startup/shutdown
> order to work correctly.
> 
> Here's some information about use cases I test. At this point, the
> active/passive use case is well understood. If you are able to, I would
> recommend modeling deployments using the A/P use case guidelines.
> 
> HA NFS Active/Passive:
> https://github.com/davidvossel/phd/blob/master/doc/presentations/nfs-ap-over
> view.pdf?raw=true
> https://github.com/davidvossel/phd/blob/master/scenarios/nfs-active-passive
> .scenario
> 
> HA NFS Active/Active:
> https://github.com/davidvossel/phd/blob/master/doc/presentations/nfs-aa-over
> view.pdf?raw=true
> https://github.com/davidvossel/phd/blob/master/scenarios/nfs-active-active.
> scenario
> 
> -- Vossel
> 
> > Cheers,
> > Hauke
> > _______________________________________________
> > Pacemaker mailing list: Pacemaker at oss.clusterlabs.org
> > http://oss.clusterlabs.org/mailman/listinfo/pacemaker
> > 
> > Project Home: http://www.clusterlabs.org
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> 
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-- 
Hauke Bruno Wollentin
(Infrastructure Engineer Cloud)


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